While driving home in the dark, all of a sudden the headlights flashed 3 times then went out and the service light came on. I had to hold the brights on to get home. Of course after I shut the car off the service light went away and no code was stored that I can get out of it. DRL's work fine, but I replaced the relay anyway. I also replaced the multifunction switch on the steering column but to no avail, still no headlights. Any other Cavalier owners seen this problem?